Radiator.



I. M. FEDDERS.

RADIATOR. APPLICAILON FILED Aue.4. 1914.

` Patented Ma 11., 1915-. 1,139.91 14: A 2 SHEETSSHEET 2.

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) I IJ/ENTUH ATTuRNEYfJ JOHN M. FEDDERS, OF BUFFALO, NEW YORK, ASSIGNOR TO FEDDERS MANUFACTURING COMPANY, INC., OF BUFFLO, NEW YORK, A CORPORATION OF NEW YORK.

RADIATOR.

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Specification of Letters Patent.

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` Application filed August 4, 1914. Serial No. 854,947;

' in which a minimum amount of metal is employed to secure a predetermined efficiency and which can be easily constructed and assembled so that the cost of manufacture is reduced to a minimum.

In the accompanying drawings: Figure l is a fragmentary elevation of a radiator em bodying my invention. Fig. 2 is a vertical cross section of the saine in line 2 2, Fig. 4. Fig. 3 is a horizontal section in line 3 3, Fig. 2. Figs. 4. and 5 are vertical longitudinal sections in the correspondingly numbered lines in Fig. 2. Figs. 6 and 7 are-fragmentary perspective views of two strips of which my improved radiator core is constructed.

Similar characters of reference indicate corresponding parts throughout the several views.

1 represents the upper water inlet header, 2 the lower water outlet header, 3 the plurality of upright water passages communieating at their upper and lower ends with the upper and lower headers and 4l a plurality of horizontal air passages arranged between the water passages and extending horizontally fore and aft of the radiator.

The core is builtjiip of a plurality of sheet metal strips each of which is bent to form part of one water passage and part of passages in one row of the same. For this purpose each strip is bent into zig-zag form so as to produce a succession or series of webs 5 of which adjacent members are arranged at right angles to one another. Each pair of successive webs of one strip form two walls of a square air passage with two adjacent walls of another strip. At oppo site longitudinal edges of each strip the same is provided with off-sets 6 which project laterally from the strip in a direction opposite to the side on which the air passages are formed and the of-sets of each strip engage with and are secured to the off-sets of an adjacent strip by solder, or

otherwise, so as to form a tight water passage between adjacent strips. Of the two strips forming a water passage one of them has some of its corners left full, as shown at 7, and others of its corners bent reversely inwardly as shown at 8 so as to form an eX- ternal concave seat, said full corners and reversely bent corners alternating with each other. In a similar manner the other strip of the two forming a water passage between them has some of its corners left full, as

shown at 9 and others of its corners bent reversely outward, as shown at l0. The full corners I are inner corners and the full corners 9 are outer corners of a completed water passage. The corresponding full corners of two adjacent strips forming a. water passage are adjacent to each other and the corresponding reversely bent corners of the same are also adjacent to each other.

In the assembled condition of the strips the outer full corners 9 of each strip engage with the seats 8 of a strip forming part of an adjacent water passage, thereby interlocking the several strips and holding the same in plaee relatively to each other during the operation of building the core and soldering its members together.

Owing to the reversely bent corners lO clearance spaces are formed between the same and the reversely bent corners 8 so as to avoid obstructing the interior of the water tubes and permit a free flow through the same. rlhe strips are connected by solder or otherwise with the upper and lower headers to form a water tight joint with the same, and the upper and lowermost air passages of the several rows are closed.

against the entrance of water from the header by connecting the upper and lower ends of each pair of strips between which a row'of air passages is formed, this connection being preferably e'ected by seams 1l, as shown in Fig. 2.

It is to be noted that in this radiator core the entire inner surface of the water passage is engaged by the water so that the maximum cooling eliiciency of the metal is obtained as the air passes through the air passages. y

The strips of the radiator can be made quickly and accurately by tools of compara` tively simple construction and the assembling of the strips can be eected quickly without requiring special skill, thereby enabling these cores to be made rapidly and at low cost. l

I claim as my invention:

` 1. A radiator core having water and air passages arranged at right angles to each other and comprising a plurality of strips each of which is bent to forni a plurality of webs which are arranged zig-zag and at right angles relatively to each other, and successive webs forming two walls of a square air passage, some of the corners of the strip being full and others bent reversely into concavo-convex form, said full corners alternating with said reversely bent corners, a plurality of such strips being assembled so that each strip forms a zig-zag water passage with one adjacent strip and a plurality of air passages with another adjacent strip, each air passage being formed by two walls of one strip and two walls of another strip, the two strips forming one water passage having their reversely bent corners adjacent to eachother in pairs so that one reversely bent corner projects into the respective water passage and forms a seat therein while the companion reversely bent corner projects outwardly from said water passage and forms a clearance space between the saine and the companion inwardly projecting corner, and the full corners of each strip engaging with the seats formed by the inwardly projecting corners of the adjacent strip which together form air passages therebetween.

2. A radiator core having water and air passages arranged at right angles to each other and comprising a plurality of strips each of which is bent to form a plurality of webs which are arranged zig-zag and at right angles relatively to each other, and successive webs forming two walls of a square air passage, some of the corners of the strip being full and others bent reversely into concavo-convex form, said full corners alternating with said reversely bent corners, a plurality of such strips being assembled so that each strip Jforms a zig-zag water passage with one adjacent strip and a plurality of air passages with another adjacent strip, each air passage being formed by two walls of one strip andvtwo walls of another strip, the two strips forming one water passage having their reversely bent corners adjacent to each other in pairs so that one reversely bent corner projects into the respective water passage and forms a seat therein while the companion reversely bent corner projects outwardly from said water passage and forms a clearance space between the same and the companion inwardly projecting corner, the full corners of each strip engaging with the seats formed by the inwardly projecting corners of the adjacent strip which together form air passages therebetween, and opposite edges of each strip having offsets which engage with the corresponding ofi`-sets of the strip with which the same forms a water passage.

Witness my hand thisthird day of August, 1914:.

JOHN M. FEDDERS. i

Y Vitnesses:

THEO. L. PoPr, E. M. GRAHAM. 

